If my dog has a serious flea infestation, can I use Para|Defense® Advanced for Dogs more often than once a month?
ParaDefense Advanced for Dogs is designed to be effective for a full month under normal conditions. However, in extreme cases, another treatment may be necessary earlier than four weeks on the advice of your veterinarian.
Call your veterinarian if your dog is having unusual discomfort from the infestation. Never re-treat your dog more often than once every seven days. Once flea control is achieved, resume your normal monthly treatment schedule.